7 Checklist Items to Include on a Daily Inspection Sheet for a Total Station (EDM)

A total station measures distances and angles and is used for setting out positions on site, checking as-built conditions, surveying from reference points, and verification surveys during construction. On site, people tend to think "it worked fine yesterday so it'll be fine today too," but surveying instruments can be affected by small day-to-day changes in conditions such as movement, vibration, rain, dust, temperature differences, battery level, tripod condition, and how the prism is handled. Preparing a daily inspection checklist reduces missed checks and makes it easier to explain the survey results.

A daily inspection checklist is not merely for confirming whether equipment operates. It is a practical record for documenting who checked what condition and when, and how any abnormalities were assessed. This article explains seven check items to include on a daily inspection checklist for total stations, presented from a field-friendly, practical perspective for personnel who use them on site.

Table of Contents

• Why the Daily Inspection Checklist Supports the Work Quality of Total Stations

• Check item 1: Confirmation of the unit's exterior appearance and storage condition

• Check Item 2: Confirm the tripod and leveling head are securely fixed.

• Checklist Item 3: Check power supply, batteries, display, and controls

• Check item 4: Confirm the telescope, lens, and sighting condition.

• Checklist item 5: Inspection of prisms, poles, and reflective targets

• Checklist item 6: Simple verification of distance and angle measurements

• Checklist Item 7: Verification of Records, Data Storage, and Inspector Information

• Operational points for keeping daily inspection checklists in use on site

• Summary: The inspection form serves as a field record for explaining the survey results.

Why daily inspection checklists support the work quality of total stations

The purpose of creating a daily inspection checklist for a total station is to verify the condition of surveying equipment according to a consistent procedure before fieldwork and to detect potential issues that could affect survey results at an early stage. A total station is a precision instrument, and even if it appears to be fine externally, factors such as insufficient tightening of the tripod, inadequate leveling, dirty lenses, failure to check the prism constant, low battery charge, or differences in recording settings can lead to variability in survey outcomes.

In particular on civil engineering sites, surveying work does not take place in isolation. The results of setting out positions affect subsequent processes such as excavation, formwork, rebar, paving, erection of structures, and as-built verification. If a position or elevation established on site is later questioned, records that can explain “which instrument was used to measure it,” “whether inspections were performed,” “whether control points and backsights were checked,” and “whether there were any abnormalities” are required. The daily inspection checklist serves as the foundation for that explanation.

Also, by using a daily inspection checklist, you can reduce differences in how each person performs checks. Experienced staff unconsciously carry out many inspections, but new or temporary staff often find it difficult to judge how thoroughly they need to inspect. If the checklist explicitly documents the inspection items, the inspection procedure can be shared and handovers become easier.

However, the daily inspection checklist does not replace precise calibration or specialized inspections. The daily inspection is a check to detect signs of abnormalities before on-site use. If measurements show unusual discrepancies, the instrument has been subjected to an impact, leveling or sighting appears abnormal, or the regular calibration period has been reached, you must determine whether to continue use in accordance with company rules, the client’s instructions, and equipment management standards.

The items included on a daily inspection checklist, if too detailed, won’t be sustained in the field. Conversely, if they are too simple, they will be insufficient as a record for explaining survey results. What matters is organizing the checklist around areas that are likely to affect survey results, so that items can be checked quickly and lead to decisions when abnormalities occur.

Check Item 1: Inspecting the Unit's Exterior and Storage Condition

The first thing to check is the appearance and storage condition of the total station main unit. Before taking it to the site or setting it up, inspect the main unit for any major scratches, dents, cracks, missing parts, damaged covers, looseness or lifting of control elements, or deformation of connection points. Even if you thought you stored it without issue after the previous day’s work, vibrations during transport or contact inside the case can have altered its condition.

On the inspection checklist, it is useful in practice to include not only whether the instrument’s exterior shows any abnormalities but also the condition of its carrying case. If the case’s fasteners are damaged, the internal cushioning has come loose, or moisture or mud remains inside the case, the instrument may not be adequately protected. Because electro-optical surveying instruments are often used outdoors, insufficient cleaning or drying after work can affect the lenses, contacts, and moving parts the next time they are used.

When performing a visual inspection, it's important to check whether anything has changed since the last time it was used. Rather than simply writing "no scratches," use expressions closer to practical judgment such as "no damage affecting usability" or "no noticeable change since the last use," which make the record more useful. Not all small scratches are problematic, but scratches that suggest a drop or fall, deformation around the tripod mounting points, or damage that could affect the telescope's movement should be judged carefully before use.

When checking storage conditions, pay attention to moisture and condensation as well. In seasons with temperature fluctuations or when working after rain, moisture may remain inside the case. Using the device when the lens surface is fogged or the main unit is still wet not only makes sighting difficult but is also undesirable for equipment management. On the inspection checklist, include easily judged phrases such as "no moisture inside the case," "no wetness on the main unit," and "no fogging around the lens."

A visual inspection of the instrument’s exterior can be completed in a relatively short time during routine checks. However, if abnormalities are overlooked at this stage, it becomes difficult to trace later irregularities in survey measurements back to equipment problems. When you take the total station out, it is important to incorporate into the inspection checklist the habit of first checking the instrument and its case for anything unusual.

Check Item 2: Verify the Tripod and Leveling Unit Are Securely Fastened

To stabilize measurement results from a total station, not only the instrument itself but also the condition of the tripod and the leveling base are important. No matter how well the instrument itself is functioning, if a tripod leg slips, the tightening is insufficient, the leveling base is not securely fixed, or the tripod is not firmly standing on the ground, minute movements may occur during surveying. The fixation status of the tripod and the leveling base should be included in the daily inspection checklist.

For a tripod, check the condition of the leg extension sections, locking screws, spiked feet, leg heads, and connection screws. If the leg extension is too stiff or too loose, it becomes difficult to achieve a stable setup on site. If the locking screws are worn, the leg length can change slightly during use. If mud is packed into the spiked feet or the tips are worn, their grip on the ground can become unstable.

In the leveling section, after attaching the main unit to the tripod, confirm that it is securely fixed. If the mounting screw is not tightened sufficiently before operation, the main unit may move due to rotation or vibration during aiming. Also be careful if the movement of the leveling screw is extremely stiff, conversely too loose, or if it catches midway. The ease of leveling affects not only work efficiency but also the stability of the installation.

In an inspection checklist, it is more usable if you list the actions to be checked separately, for example, "no looseness in tripod leg fastenings," "no play in the tripod head," "confirm tightening of the main body mounting screw," and "no abnormality in the operation of the leveling screw." If you simply write "check tripod," the scope of the check tends to vary from person to person. The purpose of a daily inspection checklist is to reduce differences among personnel, so it is important to use wording that makes clear what should be checked.

When inspecting a tripod, also check the condition of the installation site. Stability varies with the installation surface—paved areas, crushed-stone areas, bare soil, locations near slopes, or on structures. On soft ground the legs can sink, and in areas with vibration subtle movement may occur during surveying. In the inspection form, in addition to the condition of the equipment itself, it can be useful to include an item to confirm whether there is any risk of settlement or sliding of the installation surface.

By adding items for the tripod and leveling components to the daily inspection checklist, it becomes easier to reduce causes such as "the instrument itself was functioning properly, but the setup was unstable." When surveying results deviate, it is not uncommon for the installation condition, as well as the instrument's performance, to be the cause. Stable surveying begins with a stable setup.

Checklist Item 3: Verification of Power, Battery, Display, and Controls

Before using a total station in the field, it is essential to check the power supply, batteries, display, and controls. If the battery level becomes low during surveying work, it can not only interrupt operations but also affect records and verification tasks in the middle of measurements. In particular, when tasks such as reference-point checks, backsight verification, setting-out, and as-built checks are performed consecutively, a power loss midway can require re-establishing the instrument and repeating checks.

Include a field for checking battery charge level on the daily inspection checklist. Rather than simply recording "battery present," it is more practical to make it possible to check "whether there is sufficient charge for the planned work," "whether a spare battery is being carried," and "whether it is charged." During long-duration work or work in cold periods, batteries may seem to drain more quickly. Depending on site conditions, it is reassuring to include checks for spare batteries and charging arrangements in the inspection items.

When checking the display, verify whether the screen is displaying normally, whether characters and numbers can be read, and whether there are any cutoffs or flickering in the display. Outdoors, sunlight can make the display difficult to see; this is a visibility issue related to working conditions rather than a device malfunction. Working while the display is hard to see may lead to misreading coordinate values, point names, measurement modes, units, correction settings, and so on.

For the control panel, check whether the main buttons and input operations respond. Verify whether, after powering on, you can proceed to the main screen, switch measurement modes, open the necessary settings screens, and perform recording operations without issues. It is not necessary to check every function in detail every morning, but it is advisable to confirm the responsiveness of the functions you will use that day before use.

Also, it is useful to include checks of settings related to date and time, units, and measurement conditions in the daily inspection checklist. When organizing recorded data later, if the instrument's internal date or the handling of point names is inconsistent, it can be difficult to tell which measurement was taken when. Display units for distance and angles, coordinate display format, and selection of recording destination can also be added as checklist items tailored to each site’s operating procedures.

Abnormalities in power or the display are items that are easy to notice before starting work. At the same time, they are also items that are easily overlooked when you are in a hurry. In situations such as going into surveying immediately after the morning meeting, or quickly setting out positions to coincide with heavy equipment operations, checks tend to be postponed. If you include sections for power, batteries, display, and controls on the inspection checklist, it becomes easier to establish them as basic pre-start checks.

Checklist Item 4: Checking the Telescope, Lens, and Sighting Condition

An electro-optical surveying instrument is a device that measures by correctly sighting a target. Therefore, the telescope, lens, focus adjustment, appearance of the crosshairs, and any discomfort when sighting are items that should be checked during daily inspections. If the lens has dirt, water droplets, dust, or fingerprints on it, the target can become difficult to see, which may lead to variations in sighting. Especially with morning dew, after rain, or at sites with a lot of dust, you need to carefully check the condition around the lens.

The checklist should include items such as "no dirt on the objective lens", "no dirt on the eyepiece", "no abnormalities in focus adjustment", and "no issues with the appearance of the reticle". If lens cleaning is performed, it should be done using a method appropriate for the equipment. Wiping vigorously with cloths or gloves available on site can cause fine scratches or spread dirt. On the daily inspection checklist, in addition to marking "cleaned" where necessary, attaching an operational note such as "take care with cleaning methods" makes it easier to use for training new staff.

When checking the sighting condition, look at a distinct distant target and verify whether it comes into focus, whether the image is not excessively blurred, and whether any fogging or foreign matter is visible in the field of view. If the crosshairs are hard to see, this may be due to insufficient adjustment on the eyepiece side, but if the same sense of discomfort occurs every time, an inspection of the equipment’s condition is necessary. The purpose of daily inspections is not to perform professional disassembly or adjustment, but to detect abnormalities that the user can notice on-site.

The rotation, vertical movement, and horizontal rotation of the telescope assembly should also be checked. Conditions such as movement being excessively stiff, catching partway, drifting slightly even when thought to be locked, or unstable fine-adjustment control will affect the repeatability of alignment work. Adding a column on the inspection checklist to record the feel of movable parts makes it easier to detect early signs of anomalies.

Also, when checking alignment, actually sighting the prism or target can be effective. When you center the target, confirm that the alignment has not shifted significantly before and after measurement and that it has not moved after being secured. On windy days or when the tripod’s mounting surface is unstable, shifts after sighting are more likely to occur. It is important to check the instrument’s telescope together with the installation condition, not just the telescope itself.

Inspecting telescopes and lenses is fundamental before proceeding to verify the numerical values of survey measurements. If measurements are taken under poor visibility, the work tends to rely on the operator's experience. To ensure consistent checks regardless of who uses the equipment, include a column for sighting condition on the daily inspection checklist.

Checklist Item 5: Inspection of Prism, Pole, and Reflective Target

When using a total station to perform distance measurements and surveying, not only the instrument itself but also the condition of peripheral equipment such as prisms, poles, and reflective targets is important. If you create a daily inspection checklist focused only on the instrument, you may omit checks of peripheral equipment that affect actual survey results. Because surveying does not rely solely on the instrument, the daily inspection checklist should also include items for related equipment.

For prisms, it is important to check the reflective surface for dirt, cracks, or clouding, ensure the mounting is not loose, and verify the prism constant. If the reflective surface is dirty, distance measurements can become unstable or may take longer. If the prism type or settings do not match the on-site measurement conditions, they can affect the measured distances. Adding a field to the inspection checklist such as "Does the prism to be used match the instrument settings?" can reduce omissions when confirming settings.

For the pole, check the condition of the bubble vial, the locking of the telescoping sections, the readability of the scale, wear at the tip, and whether it is bent. If the pole is bent or the telescoping lock is not secure, it will affect prism height management and maintaining verticality. Especially during surveying and as-built verification, the pole’s verticality influences the results, so it is important to include a check of the bubble vial in daily inspections.

When using reflective targets, it is also necessary to check their adhesion, cleanliness, folds or damage, orientation, and identification number. In confined sites or around structures, reflective targets are sometimes used instead of prisms. In such cases, if a target is not fully adhered, is attached to a curved surface, is dirty, or is in a condition that can be easily mistaken for another point, it becomes difficult to verify the measurement results.

On a daily inspection checklist, it is more practical to separate the inspection columns according to planned use rather than lumping peripheral equipment together as "accessory check." For example, if you will use a prism on a given day, have a prism column to check; if you will use a pole, have a pole column; if you will use a reflective target, have a target column—this makes it easier to match on-site work. The idea is not to check everything in detail every day, but to reliably confirm the items that will be used that day.

Also, recording prism height and target height makes it easier to verify later. When questions arise about surveying results, inspection records of the instrument itself may not be enough to trace the cause. If you record the prism and pole used, prism height, target height, and the name of the person in charge on the daily inspection sheet or survey record, it will be easier to sort out the situation afterward.

Checklist Item 6: Simple Verification of Distance and Angle Measurements

Including a simple check of distance and angle measurements in the daily inspection checklist can help reduce anxiety before on-site use. This is not a professional calibration but a simple inspection to verify there are no obvious abnormalities before using the instrument on site. Because a total station handles distance and angle measurements, it is important not only that the unit powers up but also that the measurements are stable within their normal ranges.

For a simple verification of distance measurement, you can use known points within the site that are easy to reproduce or distances that were confirmed previously. Because it is difficult to reproduce exactly the same conditions each time, daily inspections should focus less on strict pass/fail judgments and more on whether there are any extreme differences compared with the previous check, whether the measured values are stable, and whether the measurement is taking an unusually long time. In the inspection sheet, it is useful to include fields such as "confirmation of known distance," "no large variation in measured distance," and "no ranging errors."

For a simple check of angle measurements, use a backsight or a check point to verify there is no unnatural deviation in the aiming direction. When starting work on site from a reference point, backsight verification forms the foundation of the entire survey. If you begin surveying without confirming the backsight direction, issues affecting the overall orientation may be discovered later. In daily inspection checklists, include items such as "Backsight confirmed", "Direction confirmed at check point", and "Confirm that the difference on re-aiming is within site standards" to match practical workflows.

What you need to be careful about here is how you write tolerance ranges. The required level of accuracy varies depending on the site and the nature of the work. When entering uniform numeric values on daily inspection forms, you must determine them based on company standards, client specifications, and the nature of the work. If there are no clear standards, rather than arbitrarily entering definitive numbers, it is safer to use expressions suited to your procedures, such as "verify against site standards" and "record the judgment of the person responsible for the work."

A simple check of distances and angles is effective not only before starting work but also after relocating the equipment. On site, you cannot always work all day from a single spot. You may need to reposition the instrument because survey points move, line of sight is blocked by structures, or the equipment location must be changed to match heavy machinery operations. Performing a backsight check and measuring control/check points after relocation, and recording the results, makes it easier to determine when the surveying conditions changed.

Also, when checking measurements, pay attention to weather and visibility conditions. Rain, fog, strong winds, heat haze, dust, vibration, and direct sunlight can affect the stability of sighting and distance measurements. Including a simple field for weather and visibility on the daily inspection sheet will be helpful when explaining survey results later. It is important not only to record the measurements themselves but also to record the conditions under which they were taken.

Checklist Item 7: Confirmation of Records, Data Storage, and Inspector Information

One thing that is easily overlooked on a total station's daily inspection checklist is verification of records, data storage, and inspector information. Even if the instrument itself and peripheral equipment show no abnormalities, if the destination for saving measurement data is incorrect, point naming does not conform to site rules, data becomes mixed with previous records, or the inspector/operator is not recorded, it will be difficult to organize in subsequent processes. The daily inspection checklist should be used not only to confirm the condition of the equipment but also as the entry point for records management.

First thing to check is the storage location for the measurement data and the site name. If you are responsible for multiple sites or sections, past data may remain on the device. If data are not saved in a way that shows the site name, work date, point name, the person who took the measurements, and the survey details, it will be hard to identify them when you retrieve the data later. It is useful to include items such as "confirm storage location", "confirm site name", "confirm point-name rules", and "prevent mixing with unnecessary past data" on the inspection checklist.

Next, record the inspector's information. On the daily inspection form, it is good to include the inspection date, inspection time, inspector, user, equipment management number, and the name of the site where it is scheduled to be used. If the inspector and the actual user are different, keeping that distinction makes it easier to clarify who is responsible. This is not to assign blame, but basic information for checking the situation later.

A section for recording abnormalities is also important. If an inspection checklist only offers "Good" or "Bad" options, minor concerns and the actions taken will not be recorded. For example, having a field to record entries such as "Lens was dirty; cleaned before use," "Felt looseness in the tripod fixing screw; replaced with spare tripod," "Battery level was low; used spare battery," or "Display was hard to read; rechecked before operation" makes the record useful as a work record.

We also recommend including a decision field on the inspection checklist to indicate whether something is usable. If an abnormality is found during inspection, it is necessary to decide whether the on-site personnel may continue to use it as is, whether they should confirm with the person responsible for the work, or whether it should be replaced with another device. Including decision fields such as "Usable", "Requires confirmation", and "Do not use" on the inspection checklist helps prevent responses to abnormalities from becoming ambiguous.

When confirming data storage, it's also good to be mindful of how outputs are generated and shared after measurements. If the results measured in the field are organized in the office, reflected in as-built documentation, or shared with stakeholders, managing measurement data and inspection records separately can make it difficult to determine their correspondence later. If you record the work date, instrument number, and survey data name on the daily inspection sheet, it becomes easier to link measurement data with the inspection history.

Daily inspections are completed before work begins, but their value persists afterward. When you need to explain survey results, an inspection checklist allows you to review the condition of the equipment, the operating conditions, the person responsible, and the items that were checked. To improve the quality of the records, include data storage and inspector information as checklist items.

Operational points for keeping daily inspection checklists in use on-site

A daily inspection checklist is meaningless if it is only created. It is important to make it in a form that can be used continuously on site without undue burden. If there are too many items, checks tend to become a mere formality during busy morning preparations. Conversely, if there are too few items, the record will be insufficient to explain abnormalities. As a practical approach, start with the seven items introduced here as a basic set and adjust them to suit your company’s work and site conditions.

When creating an inspection checklist, it's important to make the check/verification field use clear, easy-to-judge expressions rather than leaving it blank. Providing choices that are easy to select on-site—such as "Checked", "No abnormalities", "Cleaned", "Requires verification", and "Out of service"—reduces variability in records. However, if everything is made selectable, it becomes harder to retain situational explanations. It's advisable to include a remarks column where staff can write notes when abnormalities or observations are found.

Inspection checklists can be either paper or electronic, but it is important to choose the method that is easy to use on site. Paper checklists have the advantage that anyone can fill them out immediately and they can be kept in equipment cases. On the other hand, storage and retrieval require effort. Managing them as electronic data has the advantage of being easily linked with photos and survey data, but it requires preparation of input devices and rules for storage. Whichever you choose, it is important to ensure that inspection records can be found later.

Also decide on the timing of inspections. The basic rule is a pre-use inspection, but depending on site conditions, post-use inspections, inspections after relocation, inspections after rain, and ad hoc inspections when a drop or contact is suspected may be necessary. In particular, after moving the tripod, after the equipment has been contacted by people or objects, after being exposed to sudden rain, or after any abnormality is noticed in measurement values, perform checks in addition to the regular inspections and record them.

When using an inspection checklist, training the personnel in charge is indispensable. Even if you hand a checklist to a newcomer, it will not lead to proper verification if they do not understand the meaning of the items. For example, it is necessary to share on-site while looking at the actual equipment what condition "looseness of the leveling mechanism" refers to, what to look for regarding "a sense of abnormality in the sighting condition," and what degree of change in "fluctuations in distance measurement values" should be considered problematic. The checklist can also be used as training material.

Also, review the inspection checklist regularly. When used on site, unnecessary items, items that should be added, and items with unclear wording will become apparent. For example, at sites with frequent work in rainy conditions, increase checks related to waterproofing and drying; at sites with many surveying tasks, make backsight checks and verification-point measurements more detailed; and at sites where equipment is shared among multiple people, add records for the user and the person who returned it.

The key to continuing to use a daily inspection checklist is not to make inspections feel like tedious paperwork. The checklist is a tool to prevent surveying errors, reduce rework, and make it easier to explain survey results. By narrowing the items to those that match the actual conditions on site and organizing them so they can be checked quickly, you make it easier to incorporate into daily work.

Summary: The inspection checklist serves as an on-site record for explaining survey results

Items to include in a daily inspection checklist for a total station are seven: instrument exterior, tripod and leveling mechanism, power and controls, telescope and lens, prism and pole, simple checks of distance and angle, and records and inspector information. Each of these is a basic verification item that affects surveying results in the field. Organizing them into a checklist reduces omissions in checks by individual operators and makes it easier to assess abnormalities when they occur.

Daily inspections are not a substitute for professional calibration or detailed inspections. However, checking equipment and surrounding conditions before daily use and keeping a record of them is an important practice that supports the reliability of surveying work. When questions arise about survey results, having an inspection form allows you to review the condition of the equipment, the setup, the auxiliary equipment used, and the pre-measurement checks.

Especially on civil engineering sites, surveying has a major impact on subsequent processes. There are many situations where decisions are made based on survey results, such as setting out positions, verifying as-built conditions, comparing before-and-after construction, and checking interfaces with structures. For that reason, the daily inspection checklist for the total station should be treated not as a mere tick-box sheet but as site quality control documentation.

When creating a daily inspection checklist, first narrow it down to the items that will actually be checked on-site and start with a format that can be completed quickly before use. Then, by adding a remarks field for abnormalities, a usability decision field, inspector information, and links to survey data names, you increase the value of the records. Whether you operate on paper or with electronic data, prepare it so that it can be reviewed later.

Also, to make daily inspections and surveying records from total stations more useful on site, it is important to have a system that can organize measurement results together with photos, location information, and field notes. If you can check the instrument’s condition with an inspection checklist and record surveying data linked to site conditions, it becomes easier to explain construction management and as-built verification. If you want to efficiently retain on-site surveying records while planning for sharing with stakeholders and future reviews, consider record management methods and surveying support tools that fit your company’s operations.